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WQG-11干湿球温度计是一种测定气温、气湿的一种仪器。干湿球温度表是由两支型号完全一样的温度表组成。温度表是根据水银（酒精）热胀冷缩的特性制成的。分感应球部、毛细管、刻度磁板、外套管四个部分
根据测出的干球温度和湿球温度,查“湿空气线图”，可以得知此状态下空气的温度、湿度、比热、比焓、比容、水蒸气分压、热量、显热、潜热等资料。例如：干球18度，湿球15度时，其度差3度之纵栏与湿球15度之横栏交叉68度就是表示湿气为68%。
通过测的的数值,对照湿空气线图可以计算空气加热，冷却，加湿和减湿的状态变化。
干湿球湿度计的特点
早在18世纪人类就发明了干湿球湿度计，干湿球湿度计的准确度还取决于干球、湿球两支温度计本身的精度；湿度计必须处于通风状态：只有纱布水套、水质、风速都满足一定要求时，才能达到规定的准确度。干湿球湿度计的准确度只有5％一7％RH。
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